fails:Date#ordinal_to_jd should convert an ordinal date (year-day) to a Julian day number
fails:Date#jd_to_ordinal should convert a Julian day number into an ordinal date
fails:Date#civil_to_jd should convert a civil date into a Julian day number
fails:Date#jd_to_civil should convert a Julian day into a civil date
fails:Date#commercial_to_jd should convert a commercial date (year - week - day of week) into a Julian day number
fails:Date#jd_to_commercial should convert a Julian day number into a commercial date
fails:Date#ajd_to_jd should convert a Astronomical Julian day number into a Julian day number
fails:Date#jd_to_ajd should convert a Julian day number into a Astronomical Julian day number
fails:Date#day_fraction_to_time should be able to convert a day fraction into time
fails:Date#time_to_day_fraction should be able to convert a time into a day fraction
fails:Date#amjd_to_ajd shoud be able to convert Astronomical Modified Julian day numbers into Astronomical Julian day numbers
fails:Date#ajd_to_amjd shoud be able to convert Astronomical Julian day numbers into Astronomical Modified Julian day numbers
fails:Date#mjd_to_jd shoud be able to convert Modified Julian day numbers into Julian day numbers
fails:Date#jd_to_mjd shoud be able to convert Julian day numbers into Modified Julian day numbers
fails:Date#ld_to_jd should be able to convert the number of days since the Gregorian calendar in Italy into Julian day numbers
fails:Date#jd_to_ld should be able to convert Julian day numbers into the number of days since the Gregorian calendar in Italy
fails:Date#jd_to_wday should be able to convert a Julian day number into a week day number
